Well, this story is not at the end yet...
The problem is still here, only on the vsphere client, it vanished on the web client.
As you can see here, the Used space is correct (1.05 TB)
But it is not correct here (19 GB)
Moreover, the values returned by PowerCli is buggy too :
Uncommited is 1262 GB (1356126488716 KB) but it should be 205 GB
And on the vm informations, the "UsedSpaceGB" is ~ 19GB, should be ~1.05TB
Some thoughts :
1/ It seems to be buggy only on huge VM ( > 1TB disks). Other seems fine
2/ How the web client os calculating the good infos ? Is there a new method on PowerCli to retrieve these numbers ?
-Vincent